Code Snippets

A curated collection of useful code snippets, examples, and ready-to-use solutions for various programming languages, frameworks, and common development scenarios. Copy, paste, and adapt for your projects.

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All Snippets17Bash and Python1Python, Node.js and Go1SQL and Python1Bash6Python5Typescript3
AWS DynamoDB CRUD Operations in Node.js with the AWS SDK v3

AWS DynamoDB CRUD Operations in Node.js with the AWS SDK v3

Quick Tip Wrap the low-level DynamoDB client in a DynamoDBDocumentClient so you pass plain JavaScript objects in and get plain objects back, then guard your writes with ConditionExpression an

#DynamoDB#Node.js#AWS SDK v3+3 tags
Typescript
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Python Async HTTP Requests with aiohttp: Fetch Multiple URLs Concurrently

Python Async HTTP Requests with aiohttp: Fetch Multiple URLs Concurrently

Quick Tip Reuse one aiohttp session, fan your requests out with asyncio.gather, and cap them with a semaphore to fetch hundreds of URLs in the time one loop would take. The Problem **The

#Python#Aiohttp#Asyncio+3 tags
Python
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Bash Retry Function: Automatically Retry Failing Commands with Exponential Backoff

Bash Retry Function: Automatically Retry Failing Commands with Exponential Backoff

Quick Tip Wrap any flaky command in one reusable retry function and stop re-running red pipelines by hand. The Problem The Problem Some commands fail for reasons that have nothing to

#Bash#Retry#Exponential Backoff+3 tags
Bash
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Node.js Environment Variable Validation with Zod at Startup

Node.js Environment Variable Validation with Zod at Startup

Most Node.js apps treat process.env like a trusted friend. You reach into it whenever you need a value, assume the key is there, assume it's spelled right, and assume the string is actually the type

#Node.js#TypeScript#Zod+5 tags
Typescript
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AWS EC2 Instance Management with Boto3: Start, Stop, and Query Instances

AWS EC2 Instance Management with Boto3: Start, Stop, and Query Instances

If you've ever spent 20 minutes clicking through the AWS Console just to stop a handful of dev instances, you already know the pain. It's tedious, it doesn't scale, and one wrong click can ruin your a

#AWS#EC2#Boto3+6 tags
Python
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Redis Caching Patterns: Cache-Aside, Write-Through & Cache Invalidation

Redis Caching Patterns: Cache-Aside, Write-Through & Cache Invalidation

Need to scale your backend without throwing money at servers? Redis caching patterns are your answer. Most databases can handle hundreds of queries per second, but thousands? Your app slows to a

#Redis#Caching#Performance+6 tags
Python, Node.js and Go
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PostgreSQL Query Optimization: Indexes, EXPLAIN ANALYZE & Execution Plans

PostgreSQL Query Optimization: Indexes, EXPLAIN ANALYZE & Execution Plans

Need to optimize slow PostgreSQL queries? Here's how with EXPLAIN ANALYZE and strategic indexing. Slow database queries kill application performance. But most developers don't know where the actu

#PostgreSQL#QueryOptimization#Indexes+4 tags
SQL and Python
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Multi-Environment Secret Management with HashiCorp Vault

Multi-Environment Secret Management with HashiCorp Vault

Need to manage secrets safely across multiple environments? Here's how with HashiCorp Vault. Storing secrets in .env files, hardcoding them, or even using separate secret managers per environme

#Vault#SecretsManagement#MultiEnvironment+3 tags
Bash and Python
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#Aws4#Ec21#Boto32#Python6#Devops7#Automation4#Iam2#Cloud2#Infrastructure1#Bash5#Shell scripting5#Productivity2#Devtools2#Terminal2#Configuration3#Retry1#Exponential backoff1#Cicd2#Shell1#S32#Linux2#Environment variables2#Posix2#Vault1#Secretsmanagement1#Multienvironment1#Security1#Nodejs4#Typescript3#Secretsmanager1#Cloudsecurity1#Dynamodb1#Aws sdk v31#Crud1#Documentclient1#Zod1#Validation1#Dotenv1#Backend2#Postgresql1#Queryoptimization1#Indexes1#Performance4#Sql1#Database1#Microservices2#Printf1#Echo1#Scripting best practices1#Aiohttp1#Asyncio1#Concurrency1#Http1#Scripting1#Memoryoptimization1#Datascience1#Mlops1#Bigdata1#Bestpractices1#Redis1#Caching1#Go1#Optimization1#Ocr1#Computer vision1#Document processing1#Open source1#Ai models1#Machine learning1#Text recognition1#Zsh1